It can be used without application surface or any other surfaces. It can get really significant performance boost on mobile devices. But you always can use it on surface too.
Saturation Shader can be used on a specified sprite or background, or on fullscreen. It uses color remapping for working and doesn't change the alpha channel, so it can be used even without surfaces with special system. You should specify from what depth to start to use shader and on what to finish - on the GUI layer for example, or use shader only on sky, etc.
All graphics are from kenney.nl packs
With this shader you can:
You need intermediate knowledge of GML to use.
Please write a review if you like the asset and tell me your suggestions for improvement. If you found an error in my code or my English, please contact me ;)
My other assets! Fixture editor, LUT, physics rope, liquid simulation, textured terrain, custom savegame, day night cycle, breakable physics objects, shaders and more.